CN107299683A - Compound concrete-filled tubular column assembled docks node and connection method - Google Patents

Abstract

The invention discloses a composite steel pipe concrete column assembly type butt connection node, including a first node joint, a second node joint, a first channel steel joint, and a second channel steel joint; wherein, the first and second node joints are composed of two It consists of a front connecting plate, two side connecting plates and connecting panels. The two front connecting plates and two side connecting plates are surrounded by four connecting strips and welded symmetrically around the inner steel pipe. Each end is welded to connect the panels to form the butt joint connection nodes of the upper and lower columns. It is completely connected by bolts and abandons the traditional butt weld connection, which is convenient for construction and installation; the reserved holes are used for post-casting, which can conveniently and quickly complete the pouring of concrete at the splicing point; the splicing of node joints and columns can be prefabricated in the factory, with a high degree of industrialization .

Description

Assembled butt joints and connection methods of composite steel tube concrete columns

technical field

The invention relates to a splicing structure in building construction, in particular to an assembled butt joint of a composite steel pipe concrete column and a connection method thereof.

Background technique

At present, my country is in the stage of high-speed urbanization and industrialization development. Since the Ministry of Construction issued the "Implementation Outline of Construction Industrialization" in 1995, the Ministry of Housing and Urban-Rural Development has successively established "National Housing Industrialization Base" and "New Construction Industrialization Integrated Construction Engineering Technology Research Center" " and other bases, aiming to promote the process of my country's construction industrialization. To sum up, it can be seen that vigorously developing prefabricated building structures with convenient construction and good performance meets the needs of my country's national conditions, is of great significance to the realization of my country's industrial structure reform, and has far-reaching significance for accelerating my country's construction industrialization and industrialization.

Concrete-filled steel tube columns have the advantages of high bearing capacity, high rigidity, good seismic performance and fire resistance, and easy processing and fabrication, so they are widely used in building structures. The composite steel pipe concrete column is to add steel pipes to the steel pipe concrete to give full play to the characteristics of the steel pipe's good restraint performance, thereby improving the structural bearing capacity and stiffness, reducing the weight of the column and improving its plasticity and toughness.

The construction steps of the splicing structure of the existing composite steel pipe concrete columns are generally as follows:

(1) The butt joint of the inner steel pipe. The outer welded ear plate of the inner steel pipe is temporarily fixed as a steel pipe column to correct the verticality of the column and the flatness of the upper and lower columns, and then connect the upper column and the lower column through the ear plate, and then connect the inner steel pipe column through the butt weld.

(2) The erection of the steel cage.

(3) The butt joint of the outer steel pipe. The external welded lugs of the outer steel pipe are temporarily fixed as the outer steel pipe column to correct the verticality and flatness of the column, and then the upper and lower outer steel pipe columns are connected through the ear plate, and then the outer steel pipe column is spliced through the butt weld.

(4) Concrete pouring and vibration.

The above four steps of splicing composite steel tube concrete columns all need to be constructed on site, and involve a lot of welding work, pouring wet work, positioning and alignment, verticality correction and other processes. For a high-rise building structure, a large number of welding operations in the traditional construction plan are mostly carried out at high altitude, which requires high technical requirements for workers and has certain construction risks, thus increasing the cost of the building structure; there are many types of work involved in the construction, and the requirements for the construction site are high. , the coordinated construction requirements among various types of work are high; a large number of wet operations will not only prolong the construction period and slow down the construction progress of the structure, but the on-site construction cannot guarantee the pouring effect of the concrete in the steel pipe column; The requirements are high, and a large amount of human resources are required for management and coordination, which increases the cost of the building structure.

Therefore, there is an urgent need for a compound concrete-filled steel tube column splicing joint that is easy to manufacture, easy to construct, and assembled to connect, so as to facilitate the overall assembled construction of the compound steel tube concrete structure system, and then promote the application of this type of system in engineering.

Contents of the invention

In view of the defects or deficiencies in the above-mentioned prior art, the purpose of the present invention is to provide a composite steel pipe concrete column assembled splicing node and connection method, the connection node is connected by all bolts, and concrete operations are reduced; the composite steel pipe concrete The connection method of the column assembly splicing joint can realize the overall assembly connection of the composite steel pipe concrete structure, and the construction is simple and the cost is low.

In order to realize above-mentioned task, the present invention adopts following technical solution:

A composite steel pipe concrete column assembly type butt connection node, characterized in that it includes a first node joint, a second node joint, a first channel steel joint, and a second channel steel joint; wherein the first and second joints The joint is composed of two front connection plates, two side connection plates and connection panels. The two front connection plates and two side connection plates are surrounded by four connection strips and welded symmetrically around the inner steel pipe. After the welding is completed, respectively Each welding connection panel at the end of one end constitutes the butt joint connection node of the upper and lower columns.

According to the present invention, a second connection hole is opened on the connection panel for connection between the connection panels, and the thickness of the connection panel is greater than or equal to 4mm.

Further, the width of the front connecting plate and the side connecting plate is not less than 50 mm, the length is not less than 100 mm, and the thickness is not less than 4 mm, and the width of the front connecting plate and the side connecting plate is not less than 20 mm narrower than the width of the connecting panel.

There are holes reserved for pouring on the connecting panel, and the diameter of the reserved hole for pouring is not less than 6mm, and the connecting panel is flush with the end of the inner steel pipe.

The connection method of the above-mentioned composite steel pipe concrete column assembly type butt connection node is carried out according to the following steps:

Step 1: Connect the first and second node joints with the inner steel pipes of the upper and lower columns;

Step 2: Connect the joints of the first and second nodes with the outer steel pipe, erect the pre-embedded pouring pipe, and pour concrete;

Step 3: Complete the butt connection between the upper and lower columns by connecting the connection panels of the first node joint and the second node joint, and wrap the first and second node joints from both sides through the first channel joint and the second channel joint place;

Step 4: pour concrete or grout at the joint through the pouring reserved hole.

Compared with the prior art, the composite steel pipe concrete column assembled butt joint connection node and its connection method of the present invention have the following beneficial effects:

(1) The composite steel pipe concrete column assembly type butt connection node of the present invention adopts full bolt connection, which can effectively reduce the construction difficulty and workload caused by the traditional butt weld connection, and avoid the verticality correction work of the traditional column butt joint, and the construction is simple fast.

(2) The composite steel pipe concrete column assembly type butt joint connection node of the present invention can be prefabricated in the factory, and connected with the composite steel pipe concrete in the factory, can realize the integral assembly type connection of the composite steel pipe concrete column structure, only the butt bolt connection and groove on site The steel joint bolts connect the two processes, and the construction is simple.

(3) The composite steel pipe concrete column assembly type butt connection node of the present invention simplifies the post-casting process of concrete at the joint by reserving pouring holes, and improves the construction efficiency of the column butt connection.

Description of drawings

Fig. 1 is a schematic diagram of the connection of the composite steel pipe concrete column assembly type butt connection node in the composite steel pipe concrete structure of the present invention.

Fig. 2 is a structural schematic diagram of the mid-node joint of the composite steel pipe concrete column assembly type butt connection node.

Fig. 3 is a structural schematic diagram of a channel steel joint.

FIG. 4 is a schematic diagram of hole reservation.

Fig. 5 is another schematic view of the structure and connection of the composite steel pipe concrete column assembly type butt connection joint at the middle node joint.

Fig. 6 is a structural schematic diagram of section 1-1 in Fig. 1 .

The marks in the figure respectively indicate: 1. Inner steel pipe, 2. Outer steel pipe, 3. Concrete, 4. First node joint, 5. Second node joint, 6. First channel steel joint, 7. Second channel steel joint . 15, connecting bolt, 16, front connecting plate, 17, side connecting plate, 18, connecting lath, 19, the 4th connecting hole.

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

detailed description

As shown in Fig. 1 and Fig. 3, this embodiment provides a composite steel pipe concrete column assembly type butt connection node, including the first node joint 4, the second node joint 5, the first channel steel joint 6, and the second channel steel joint 7 . Wherein, the first and second node joints (4, 5) are made up of two front connecting plates 16, two side connecting plates 17 and connecting panels 14, and the two front connecting plates 16 and the two side connecting plates are connected by four Laths 18 are surrounded and welded symmetrically around the inner steel pipe 1. After the welding is completed, the connecting panels 14 are respectively welded at the ends of one end to form the butt joint connection nodes of the upper and lower columns.

In this embodiment, the first node joint 4 and the second node joint 5 adopt the same size specification, and the first channel steel joint 6 and the second channel steel joint 7 also adopt the same size specification. Two front connecting plates 16 and two side connecting plates 17 equally divide the 360-degree angle of the inner steel pipe 1, and the two side connecting plates 17 are parallel to the groove surfaces of the two channel steel joints.

A second connection hole 12 is provided on the upper part of the connecting panel 14 for connecting the upper and lower connecting panels 14, and the thickness of the connecting panel 14 is greater than or equal to 4mm. The width of the front connection plate 16 and the side connection plate 17 is not less than 20mm narrower than that of the connection panel 14, and the width is not less than 50mm, the length is not less than 100mm, and the thickness is not less than 4mm.

There are third connecting screw holes 13 on the front connecting plate 16 and side connecting plate 17, and there are pouring reserved holes 8 and second connecting screw holes 12 on the connecting panel 14, wherein the diameter of the pouring reserved holes 8 is not less than 6mm, and the connecting The panel 14 is flush with the end of the inner steel pipe 1 .

As shown in Fig. 1, Fig. 2, Fig. 5 and Fig. 6, using the connection method of the above-mentioned compound steel pipe concrete column assembly type butt connection node, follow the steps below:

Step 1: Connect the first node joint 4 and the second node joint 5 with the inner steel pipes 1 of the upper and lower columns;

Step 2: Connect the first and second node joints (4, 5) to the outer steel pipe 2, erect the pre-embedded pouring pipe 11, and pour concrete 3;

Step 3: Complete the butt joint between the upper column and the lower column by connecting the connecting panel 14 of the first node joint 4 and the second node joint 5, and wrap the joint from both sides through the first channel steel joint 6 and the second channel steel joint 7 The fourth step: pouring the concrete 3 or the grouting material at the first and second node joints (4, 5) through the pouring reserved hole 8 .

In step 1, as shown in Figure 1, the inner steel pipe 1 protrudes by no less than 50mm in the length direction of the outer steel pipe 2, and the front connecting plate 16, side connecting plate 17 and connecting lath 18 extend into the outer steel pipe 2 by no less than 50mm.

As shown in Fig. 6, the node joint assembly of this embodiment is used to ensure that the surface flatness of the front connecting plate 16, the side connecting plate 17 and the connecting lath 18 is as far as possible, and they are parallel to the surfaces of the outer steel pipes 2 on the corresponding surfaces.

In step 2, as shown in Figure 5, before the prefabricated composite steel pipe concrete column, a certain amount of pre-embedded pouring pipes 11 are arranged at an appropriate position between the inner steel pipe 1 and the outer steel pipe 2, and the pre-embedded pouring pipes 11 are arranged in a dispersed manner. And when pouring the concrete 3, fill it up together, and the first connecting screw hole 10 is arranged on the outer steel pipe 2.

In step three, as shown in Fig. 1 and Fig. 2, the first channel joint 6 and the second channel joint 7 are connected with the first and second node joints (4, 5) and are:

First, the connecting nuts of the corresponding apertures are pre-welded on the inside of the front connection plate 16 and the side connection plate 17 of each joint; after the first channel steel joint 6 and the second channel steel joint 7 are inserted into the splicing place from both sides, through the bolt and Pre-welded nut connections.

Preferably, in order to enhance the integrity of the structure, the bolt hole diameter specification corresponding to the embedded nut is not less than M8, and the nut hole diameter is at least 1mm smaller than the hole hole diameter. The width of the flange portion of the first and second channel steel joints (6, 7) should be half of the width of the outer steel pipe 2, so as to just wrap the joint. A fourth connection hole 19 (Fig. 4) is left on the first and second channel steel joints (6, 7). The thickness of the steel plate of the connection panel 14 is at least 1mm thicker than that of the front connection plate 16, the side connection plate 17, the channel steel joint, the inner steel pipe 1 and the outer steel pipe 2, so as to ensure the surface smoothness of the connection panel 14 after welding. The plate thickness of front connection plate 16, side connection plate 17 and channel joint is consistent with outer steel pipe 2 thicknesses.

As a preference, after all steel plates are not less than 5mm, the weld fillet size is not less than 5mm. The post-cast concrete 3 or grouting material used must be at least one grade higher than the concrete grade in the prefabricated components.

The assembled butt connection joint of composite steel pipe concrete columns given in this example has the advantages of easy manufacture, simple construction, and high degree of industrialization. The connection is conducive to promoting the popularization and application of multi-high-rise integrally assembled composite steel pipe concrete structures.

Claims (8)

1. a kind of compound concrete-filled tubular column assembled docks connecting node, it is characterised in that including first node joint (4), Section Point joint (5), the first channel-section steel joint (6), the second channel-section steel joint (7)；Wherein, first, second described node joint (4,5) are made up of two front connecting plates (16), two side gussets (17) and connection panel (14), two front connecting plates (16) it is surround by four meeting stiles (18) with two side gussets and be symmetrically welded the surrounding in interior steel pipe (1), welding After the completion of, end at one end is respectively welded to connect panel (14) respectively, constitutes levels post docking connecting node.

2. the connecting node of compound concrete-filled tubular column assembled docking as claimed in claim 1, it is characterised in that described The second connecting hole (12) is offered on connection panel (14), for connecting the connection between panel (14), connection panel (14) Thickness is more than or equal to 4mm.

3. the connecting node of compound concrete-filled tubular column assembled docking as claimed in claim 1, it is characterised in that described The width of front connecting plate (16) and side gussets (17) is not less than 50mm, and length is not less than 100mm, and thickness is not less than 4mm, And the width of front connecting plate (16) and side gussets (17) is not less than 20mm than connection panel (14) narrow width.

4. the connecting node of compound concrete-filled tubular column assembled docking as claimed in claim 1, it is characterised in that described Reserving hole (8) is poured on connection panel (14), and pours the aperture of reserving hole (8) and is not less than 6mm, connection panel (14) It is concordant with interior steel pipe (1) end.

5. the compound concrete-filled tubular column assembled described in claim 1 docks the connection method of connecting node, it is characterised in that Carry out according to the following steps：

Step one：By the interior fastener for connection of first, second node joint and levels post；

Step 2：Further with outer fastener for connection, erection is pre-buried to pour pipe, and casting concrete；

Step 3：By connecting the connection panel of first node joint and Section Point joint, pair of upper strata and lower floor's post is completed Connect, and first, second node joint is wrapped up from both sides by the first channel-section steel joint and the second channel-section steel joint；

Step 4：Joint concrete or grouting material are poured by pouring preformed hole.

6. connection method as claimed in claim 5, it is characterised in that in described step one and step 2, interior steel pipe is relatively outer The length direction of steel pipe, which is protruded, is no less than 50mm, and described front connecting plate, side gussets and meeting stile stretches into outer steel pipe (2) it is internal to be no less than 50mm.

7. connection method as claimed in claim 5, it is characterised in that in described step three, the first channel-section steel joint and second The step of channel-section steel joint is connected with first, second node joint be：The front connecting plate thrown is spelled in each node and side connects first The nut in prewelding correspondence aperture on the inside of fishplate bar；By the first channel-section steel joint and the second channel-section steel joint behind the insertion stitching portion of both sides, lead to The nut for crossing bolt and prewelding is connected.

8. the connection method of connecting node, its feature are docked according to the compound concrete-filled tubular column assembled described in claim 5 It is, in described step four, pre-buried pour in pipe pours full concrete or grouting material by pouring preformed hole.